benzyl-2,4,6-tri-O-benzyl-3-O-(2,4,6-tri-O-benzyl-β-D-glucopyranosyl)-β-D-glucopyranoside 、
6-β-D-galactopyranosyl-α-D-glucopyranosyl bromide heptaacetate 在
4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
1,2-二氯乙烷 为溶剂,
以80%的产率得到benzyl O-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-(1-6)-O-(2,3,4-tri-O-acetyl-β-D-glucopyranosyl)-(1-3)-O-(2,4,6-tri-O-benzyl-β-D-glucopyranosyl)-(1-3)-2,4,6-tri-O-benzyl-β-D-glucopyranoside